I am not super experienced when it comes to line technology, but i assume one of the benefits of sleeving is to make it easier to undo the lines. I have a few nots in my lines that are a result of some bad tangles (resulting from some hairy situations) and due to the pressure put on the line when flying the kite they are impossible to get out now. So i assume if you want to undo the knots just tying them probably would result in a permanent knot.

Anyone please correct me if iam wrong as iam just speculating.

i have never seen a knot I can't undo Maxiy. Soak them in water and massage the knot open even with your teeth if you have to. Knots can halve the breaking strain of your line although I have used a fishing knot to reconnect a broken line that seemed to work until I could replace it.

i stand happily corrected haha, i shall give both techniques a go, thanks guys very much appreciated. sorry for hijacking your post Scubaste, maybe we should all try answer the initial question :P

Lol! Gave me a chuckle ...